Internal-combustion engine



Ami 29 192% 1,492,263

H. J. POCOCK INTERNAL COMBUSTI ON ENGINE Filed Nov. 9, 1920 2 "Sheets-Sheet 1 2 9 1 K C O C O P. m H A 2 9 1 9 2 M A INTERNAL COMBUSTI ON ENGINE Filed Nov. 9, 1920 2 Sheets-$heet 2 0 villi/5 sisal a s 2, i924,

j STATE FEM Henson .1 rococn, or wns'r nmrsrnan, LONDON, nnenann, Assrsnon or ONETH T ERIC HAMILTON BQS E, 01 LONDON, ENGLAND, AND ONE-TH TQ ems anon, on em. man's woons, LON, ENG.

mmmcous'rron nnemn;

Application in Hoveinhcr 9,1920. serial no. team.

To all whomitmay concern: I Be it known that I, Homer Jams Po-- coon, 'asubject ,of the Kin of Great Britain, residing at 13 Gla ys Road, West" 5 Hampstead, in the county of London, England, have invented certain new and useful Improvements in or Relating to Internal- Combustion Engines, of which the follow.

' tating sleeve mounted 1n the cylinder and provided with the ports d, two of which are in is a specification.

tion engines. According to this invention the inletand exhaust are controlled by a rotating sleeve rovided with a port or ports'and situated etween the cylinder wall and a cylindrical cup piston, the cylindrical portion of which is also provided with ports arranged to re ister with inlet and exhaust ports of the cy inder. ,The cylinder is preferably recessed to receive the rotating sleeve, which encloses the working space of the cylinder, the inner face of the sleeve being flush with the face of the remaining part of the cylinder. The cylinder extends beyond the workin space as a narrow annular channel, forms by an inward projection of the cylinder head and receiving the cylindrical part of the piston during its inward stroke.

The chief object ofgthe invention is to simplify the working of the inlet and exhaust operations and to protect the rotating sleeve, which serves as the inlet and exhaust valve controllin element, from the. hot gases of combustion, the cu ped piston practically enclosing the com ustion space so that the combustion takes place Within the piston, I In order that the said invention may he clearlyunderstcod and readily carried into efiect, the same will now be described more fully with reference to the accompanying drawings, in which:-

Figure. lie a vertical section through a four cylinder engine illustrating this invent tion. I

Figure 1 shows in section ton sepately. 1

Figure 1" shows a detail view of the retating sleeve. 7 v l g I I W '1: 2 is a sectional plan through two cyliners of the engine on the hroken'line Q-QofFigurel." w

I Figure 2 is a similar sectional plan of the two cylinders at the left of Figure l on the the cupped pisline' 2--- showiigg of the inlet and e is invention relates to internal combusa reversed arrangement] aust ports. lfigure 3 is a vertical SBOtlOl'LDf a double acting single cylinder engine, and

Figure 4 is a cross section through the cylinder. I

A 's the engine cylinder having an inlet port B and an exhaust rt C. D is the roshown in the plan, Figures 2, 2, placed at opposite sides ofthe sleeve. E is the pise in line. with the inlet and exhaust ports 9 car the cylinder A;

ton, havinga long cylindrical cup portion 6 i provided with longitudinal ports or slots 6 Referring to the single actin engine 'illustrated in Figures 1, 2 and 2*- t e complete set of sleeves is driven "from the. inion- F on the engine driven shalt f, the pinion-gearing with the toothed ring d at the lower edge of the adjacent sleeve. The, toothed ring of the first sleeve shown at the left hand side of Figure 1 meshes with the toothed ring of the next sleeve while betweenthe toothed rings belongin tothesleeves of the middle pair of cy inde rs an intermediate 3 pinion l is provided which may be an idle.

direction so that the arran ement of inlet and exhaust-ports B and in these cylinders is the same, as in the two outer cylinders. I

The cylinder heads A are shown deeply cupped so as to rovide narrow annular channels a into which the c lindrical cups c of thepistons can extend, t e pistons of the two inner c linders being shown at about the end of t e compression stroke with the cu e e projecting to the ends of the channels a. The cylinder heads carrg the-spark ings plugs a at the lease of t eir cupped portions if the engine is provided with electrical ignitienf The sleeves D vided with a pair of ported, are 0 quarter engine s end, but it :provided with a sin is port d t e sleeves would be driven at half engine speed. The ports at are situated on the same level as the inlet and outle p r s B and G of the cylinders sothat see it pre driven at when a portal during-the rotation of the sleeve'D passes across either thei nl'et or the exhaust port of the cylinder the-port is opened to'the interior through one of the piston slots or ports 6 e which owing'to their length always register with the 'cylinder ports throughout the whole stroke of the piston so that the timing of the opening of the inlet and exhaust is entirely controlled by the rotary sleeve D.

to exhaust through the port C at the'outei end of the working stroke, as indicated in the righthand cylinder of Figure 1.

The inner end (i of the rotating sleeve is preferably rebated and the shoulder a ofthe cylinder A against which the sleeve [abuts is correspondingly rebated, so that the.

end of the sleeve is positively held in place i so i .at the inner end of the stroke the and-the cylinder and sleeve faces are flush. The cylinder head A which is waterjacketed, projects as already mentioned a considerable distance into'the cylinder, .the

projecting part being approximately equal so that iston head approaches the end of the inward y' extending cylinder head and the cylindrlcal part.of the piston lies almost wholly 1n the narrow annular channel a between the cylinder head and cylinder, the proportions of the various parts being adjusted to give the desired compression space .at the end of the compression stroke; 0

In a multicylinder engine such as is shown in Figure l, the various sleeves D are, as already described, geared together and the ports are arranged to give the proper timing for the inlet and exhaust of each cylto the cupped portion of the piston,

inder on the sleeves rotate. In the engine.

illustrated the ordinary four stroke cycle is arranged for, the left hand cylinder being shown at about the end of the inlet stroke of the piston, the second cylinder at the end of the exhaust stroke, the third cylinder at the end of the compression stroke and the fourth cylinder at the end of the working stroke with exhaust through the auxiliary port C which is uncovered by the auxiliary sleeve-port d when the piston E approaches the end of the working stroke, the auxiliary port closing as the'piston returns and the remainder of the gases being driven out of .the ordinary exhaust port'C.

' B of the right;

As the two middle and the two outer cylinders respectively have corresponding ar rangements'of plorts B and C, the inlet orts and pair of cylinders Fig; ure 1) shown in Figure 2, are adjacent to each other, andthe exhaust ports 0 (and U) are at opposite sides, whereas the ports C (and C) of the left hand pair of cylinders to the double acting piston E The sleeve D is placed intermediate ends of the cylinder bore and is driven through the toothed ring d by the engine driven pinion F The piston E is provided with the two cylindri Y .cal cups 6 one on each side, both of which are provided with the vertical slots 0 e,

for inlet and exhaust, these slots being in line with the inlet and of the cylinder A I The rotating sleeve 1) is provided at both endsWi'th the ports 01, d, the ports (i serving for the inlet and outlet ports B, C of the upper end of the cylinder while the ports d", which are angularly displaced as regards the ports i serve for the inlet and exhaust of the lower end of the cylinden For convenience of illustration the ports (1 d of both upper and lower cylinders are both exhaust ports B, C

shown in section in Figure 4, but it is to be understood that the. section :below "?/fI/ showing the ports d is taken through the lower end of the cylinder'and the section above -yy showing the ports 03 through the upper end of the cylinder. The angular displacement of the ports d and d corresponds to the difference in timing required for the inlet. and exhaust operations at the two ends of the cylinder, the cycle of operations following the usual course. The water cooled cylinder heads A,'A each form the required annular space a to receive the cylindrical cups e at the outer end of their respective strokes. The central toothed ring (Z of the rotating sleeve D is supported in the annular channel a of the cylinder, so'

and cylinder oil under pressure can be forced between the. surfaces, the oil entering through the channels a shown in Figures 1 and .3 and passing preferably through narrow spiral or other conveniently formed oil channels-in the outer surface of the sleeve or the inner surface of the cylinder against which the sleeve slides.

The rotating sleeve construction isa p'l'cable both to four stroke and to six stro e en ines and toengines employing any type offueh- What. I claim and desir to secure by Letters Patent of the United tates is 1. In an internal combustionengi i ltl menses plurality of engine cylinders each provided with inlet and exhaust ports, a continuously rotatable sleevewithin each cylinder provided with a port adapted during rotation to register in succession with the inlet and exhaust cylinder ports, engine driven means for rotating the said sleeves and a non rotatable reciprocating piston within each ryli; Ler provided with a cylindrical. cup portion having ports corresponding to the inlet and exhaust ports of the cylinder, said piston being encircled by the rotatable, valve sleeve, for the purpose specified 3. ln an internal combustion engine, an engine cylinder having" inlet and exhaust ports, a continuously driven rotatable valve sleeve within said cylinder, having a controlling port adapted to register su'ceessively with the'said inlet and exhaust ports, and a non-rotatable reciprocating piston provided with a deep cylindrical cup portion having. deep longitudinal slots correspending in position to the inlet and exhaust ports of the cylinder and adapted to open these ports in succession to the cylindear through the port of the rotatable sleeve during substantiall r the whole of a stroke of the piston, said piston being encircled by the rotatable, valve sleeve.

4. In an internal combustion engine, an engine cylinder having inlet and exhaust ports, a continuously driven rotatable valve sleeve Within the said cylinder, provided with a port adapted to register with the cylinder ports during rotation, a non-rotatable reciprocating piston having a cylindrical cup portion with longitudinal ports corresponding in position to the inlet and exhaust ports of the cylinder and a cylinder head extendinoto a considerable depth into the cylinder, leaving a clearance which forms a narrow annular channel into which the cylindrical cup portion of the piston extends during its stroke, said piston being encircled by the rotatable, valve sleeve, forv the purpose specified. 5. In an internal combustion engine, a engine cylinder provided with inlet and exhaust ports and an auxiliary exhaust port towards the outer end of the Working space, a continuously driven rotatable valve sleeve in the said cylinder provided with ports adapted to register with the cylinder ports and a non-rotatable reciprocating piston having a cylindrical cup portion with longitudinal ports corresponding in position to the said cylinder ports, said piston being encircled by the rotatable, valve sleeve, for the pur ose secified.

HORrit/E Jit '-1 PUGOCK titl till

tilt 

